https://www.ofgem.gov.uk/renewables-energy-guarantees-origin-rego/electricity-suppliers-and-generators/fuel-mix-disclosure-fmd
Fuel Mix Disclosure (FMD) | Ofgem
Fuel Mix Disclosure is a requirement on electricity suppliers in Great Britain to disclose the mix of fuels used to generate the electricity supplied annually.
fuel mix disclosurefmdofgem